Update cheatsheets

tldr/gofumpt

@@ -0,0 +1,38 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gofumpt
+
+> Strictly format Go files.
+> See also: `gofmt`.
+> More information: <https://github.com/mvdan/gofumpt#gofumpt>.
+
+- Format Go files:
+
+`gofumpt -w {{path/to/directory}}`
+
+- [l]ist files whose formatting differs from `gofumpt`:
+
+`gofumpt -l {{path/to/directory}}`
+
+- Report all [e]rrors:
+
+`gofumpt -e {{path/to/directory}}`
+
+- Display [d]iffs:
+
+`gofumpt -d {{path/to/directory}}`
+
+- Format Go files with stricter rules:
+
+`gofumpt -extra {{path/to/directory}}`
+
+- Display [d]iffs with stricter rules:
+
+`gofumpt -extra -d {{path/to/directory}}`
+
+- Display help:
+
+`gofumpt {{[-h|--help]}}`